| K-Side Group Ltd | Construction | 2021 |
| K-Zee Limited | Wholesale & retail | 2023 |
| K.H & Sons Ltd | Construction | 2019 |
| K.I Nails & Beauty Limited | Other services | 2017 |
| K2O Entertainment Limited | Arts & recreation | 2018 |
| K7 Building Solutions Ltd. | Construction | 2020 |
| K9 Club Services Limited | Other services | 2023 |
| KA Global Capital Ltd | Professional & scientific | 2025 |
| Kaan Catering & Mobile Chef Ltd | Hospitality | 2023 |
| Kaankv Properties Ltd | Real estate | 2023 |
| Kaashmit Healthcare Ltd | Wholesale & retail | 2024 |
| Kaashmit Ltd | Public administration | 2023 |
| Kaaviya Foods Ltd | Wholesale & retail | 2024 |
| Kaaviya Limited | Wholesale & retail | 2020 |
| Kaazel Ltd | Construction | 2018 |
| Kaba Barber Limited | Other services | 2019 |
| Kabilan Holdings Limited | Real estate | 2021 |
| Kabir Automotive Limited | Wholesale & retail | 2023 |
| Kadebo Properties Limited | Real estate | 2026 |
| Kader CAN Ltd | Wholesale & retail | 2025 |
| Kadiu Construction Ltd | Construction | 2023 |
| Kahika Limited | Information & communication | 2004 |
| Kaitaku Design Limited | Information & communication | 2018 |
| Kaizen Foods Limited | Hospitality | 2021 |
| Kaka Travels Ltd | Administrative & support | 2022 |
| Kaktus Estates Limited | Financial services | 2023 |
| Kalas Property Investments Ltd | Real estate | 2025 |
| Kalci Cleaning and Maintenance Ltd | Construction | 2024 |
| Kalci Properties Ltd | Real estate | 2022 |
| Kaldor Works Ltd | Professional & scientific | 2026 |
| Kale Market Ltd | Wholesale & retail | 2025 |
| Kalm Care Ltd | Health & social care | 2015 |
| Kalm Care Properties Ltd | Real estate | 2025 |
| Kalm GAS Ltd | Mining & quarrying | 2024 |
| Kalos Services Ltd | Administrative & support | 2026 |
| Kalsa&Co Ltd | Wholesale & retail | 2026 |
| Kaltun Madran Limited | Wholesale & retail | 2018 |
| Kamberkatering Ltd | Hospitality | 2025 |
| Kamelliaco Limited | Wholesale & retail | 2026 |
| Kamora Ltd | Information & communication | 2026 |
| Kandekore Social Care (KSC) Ltd | Health & social care | 2025 |
| Kandir Ltd | Construction | 2025 |
| Kapicons Management Ltd | Administrative & support | 2006 |
| Kaplan Ltd | Wholesale & retail | 2026 |
| Kaplan Property Investments Ltd | Real estate | 2023 |
| Kara Bros Ltd | Hospitality | 2022 |
| Kara Designs Ltd | Manufacturing | 1999 |
| Kara Investments SA Ltd | Real estate | 2025 |
| Kara Management Ltd | Real estate | 2003 |
| Kara Motors Ltd | Administrative & support | 2025 |
| Karab Global Ltd | Construction | 2021 |
| Karab Group Limited | Professional & scientific | 2025 |
| Karab Wealth Ltd | Real estate | 2021 |
| Karacagizem Ltd | Real estate | 2024 |
| Karahan Cleaning Services Ltd | Administrative & support | 2020 |
| Karak Chaii Enfield Ltd | Hospitality | 2025 |
| KARAKAS1 Property Ltd | Real estate | 2021 |
| Karakuyu Property Ltd | Real estate | 2022 |
| Karbra Capital Limited | Financial services | 2021 |
| Kardox Limited | Wholesale & retail | 2026 |
| Karex Global Ltd | Wholesale & retail | 2026 |
| Karine Space Limited | Wholesale & retail | 2025 |
| Karnan Trading Limited | Wholesale & retail | 2025 |
| Karousel Music C.I.C. | Information & communication | 2014 |
| Kartal Blinds Ltd | Wholesale & retail | 2025 |
| Kartal Cleaning Ltd | Administrative & support | 2025 |
| Kartal Hairdressers Ltd | Other services | 2021 |
| Kartech Cooling Ltd | Wholesale & retail | 2019 |
| Karteros Limited | Health & social care | 1997 |
| Kase Football Limited | Education | 2022 |
| Kashier Ltd | Wholesale & retail | 2026 |
| Kashmil Limited | Professional & scientific | 2008 |
| Kashson UK Limited | Health & social care | 2017 |
| Kashvi Imports & Exports Ltd | Wholesale & retail | 2025 |
| Kasim Investments Ltd | Real estate | 2025 |
| Kate Ajike Corporations Limited | Construction | 2018 |
| Katre Consultancy Ltd | Wholesale & retail | 2019 |
| Katrin Fashion Limited | Real estate | 2016 |
| Katrin Group Limited | Financial services | 2019 |
| Kaurfitnessuk Ltd | Arts & recreation | 2025 |
| Kavon Limited | Professional & scientific | 2005 |
| Kavsons Ltd | Real estate | 2023 |
| Kawila Ltd | Other services | 2018 |
| Kaya Kebab Ltd | Hospitality | 2026 |
| Kaya Optometry Ltd | Health & social care | 2019 |
| Kaya Property Group Ltd | Financial services | 2024 |
| Kaybridge Environmental Limited | Construction | 2005 |
| Kayleigh Plant Hire Limited | Construction | 1993 |
| Kaynak & SON Ltd | Construction | 2019 |
| Kayra UK Properties Ltd | Real estate | 2026 |
| Kayrem Global Ltd | Wholesale & retail | 2025 |
| Kaysmart Cleaning Services Limited | Administrative & support | 2025 |
| Kazan Restaurants Limited | Hospitality | 2010 |
| KB Property Group Ltd | Real estate | 2025 |
| KBF Holdings Limited Partnership | | 2016 |
| KBJ Finance LP | | 2015 |
| Kbtd Ltd | Transport & logistics | 2023 |
| KC Home and Living Limited | Wholesale & retail | 2023 |
| KC Twins Ltd | Construction | 2014 |
| KC. Floors Limited | Other services | 2014 |